linux-kernel - Re: [PATCH] drm/tests: Split up test cases in igt_check_drm_format_min

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Message-ID: <20220728161155.tzjalvrxaezk556t@mail.igalia.com>
Date:   Thu, 28 Jul 2022 15:11:55 -0100
From:   Melissa Wen <mwen@...lia.com>
To:     Maíra Canal <mairacanal@...eup.net>
Cc:     Isabella Basso <isabbasso@...eup.net>, magalilemes00@...il.com,
        tales.aparecida@...il.com, andrealmeid@...eup.net,
        siqueirajordao@...eup.net, Trevor Woerner <twoerner@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        Javier Martinez Canillas <javierm@...hat.com>,
        José Expósito <jose.exposito89@...il.com>,
        David Gow <davidgow@...gle.com>,
        Daniel Latypov <dlatypov@...gle.com>,
        brendanhiggins@...gle.com, Guenter Roeck <linux@...ck-us.net>,
        kernel test robot <lkp@...el.com>,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-kselftest@...r.kernel.org, kunit-dev@...glegroups.com
Subject: Re: [PATCH] drm/tests: Split up test cases in
 igt_check_drm_format_min_pitch

On 07/17, Maíra Canal wrote:
> The igt_check_drm_format_min_pitch() function had a lot of
> KUNIT_EXPECT_* calls, all of which ended up allocating and initializing
> various test assertion structures on the stack.
> 
> This behavior was producing -Wframe-larger-than warnings on PowerPC, i386,
> and MIPS architectures, such as:
> 
> drivers/gpu/drm/tests/drm_format_test.c: In function 'igt_check_drm_format_min_pitch':
> drivers/gpu/drm/tests/drm_format_test.c:271:1: error: the frame size of
> 3712 bytes is larger than 2048 bytes
> 
> So, the igt_check_drm_format_min_pitch() test case was split into three
> smaller functions: one testing single plane formats, one testing multiple
> planes formats, and the other testing tiled formats.
> 
Hi Maíra,

Could you add a Fixes tag to indicate the commit that introduces the
issue?

Thanks,

Melissa

> Reported-by: kernel test robot <lkp@...el.com>
> Reported-by: Guenter Roeck <linux@...ck-us.net>
> Signed-off-by: Maíra Canal <mairacanal@...eup.net>
> ---
>  drivers/gpu/drm/tests/drm_format_test.c | 16 ++++++++++++++--
>  1 file changed, 14 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/tests/drm_format_test.c b/drivers/gpu/drm/tests/drm_format_test.c
> index 056cb8599d6d..28f2b8f88818 100644
> --- a/drivers/gpu/drm/tests/drm_format_test.c
> +++ b/drivers/gpu/drm/tests/drm_format_test.c
> @@ -91,7 +91,7 @@ static void igt_check_drm_format_block_height(struct kunit *test)
>  	KUNIT_EXPECT_FALSE(test, drm_format_info_block_height(info, -1));
>  }
>  
> -static void igt_check_drm_format_min_pitch(struct kunit *test)
> +static void igt_check_drm_format_min_pitch_for_single_plane(struct kunit *test)
>  {
>  	const struct drm_format_info *info = NULL;
>  
> @@ -175,6 +175,11 @@ static void igt_check_drm_format_min_pitch(struct kunit *test)
>  			(uint64_t)UINT_MAX * 4);
>  	KUNIT_EXPECT_EQ(test, drm_format_info_min_pitch(info, 0, (UINT_MAX - 1)),
>  			(uint64_t)(UINT_MAX - 1) * 4);
> +}
> +
> +static void igt_check_drm_format_min_pitch_for_multiple_planes(struct kunit *test)
> +{
> +	const struct drm_format_info *info = NULL;
>  
>  	/* Test 2 planes format */
>  	info = drm_format_info(DRM_FORMAT_NV12);
> @@ -249,6 +254,11 @@ static void igt_check_drm_format_min_pitch(struct kunit *test)
>  			(uint64_t)(UINT_MAX - 1) / 2);
>  	KUNIT_EXPECT_EQ(test, drm_format_info_min_pitch(info, 2, (UINT_MAX - 1) / 2),
>  			(uint64_t)(UINT_MAX - 1) / 2);
> +}
> +
> +static void igt_check_drm_format_min_pitch_for_tiled_format(struct kunit *test)
> +{
> +	const struct drm_format_info *info = NULL;
>  
>  	/* Test tiled format */
>  	info = drm_format_info(DRM_FORMAT_X0L2);
> @@ -273,7 +283,9 @@ static void igt_check_drm_format_min_pitch(struct kunit *test)
>  static struct kunit_case drm_format_tests[] = {
>  	KUNIT_CASE(igt_check_drm_format_block_width),
>  	KUNIT_CASE(igt_check_drm_format_block_height),
> -	KUNIT_CASE(igt_check_drm_format_min_pitch),
> +	KUNIT_CASE(igt_check_drm_format_min_pitch_for_single_plane),
> +	KUNIT_CASE(igt_check_drm_format_min_pitch_for_multiple_planes),
> +	KUNIT_CASE(igt_check_drm_format_min_pitch_for_tiled_format),
>  	{ }
>  };
>  
> -- 
> 2.36.1
> 

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